I had to remove my steering column several years ago, and getting it out was a horror show. The point of contention was the coupler, I got the pin out, but the coupler would not come free..I actually used a sawzall to cut the coupler box up, I was advised that an oxygen wrench would cook the seals in the chuck.
If you get that far in replacement, there is a stamped steel cover at the end of the column and on top of the coupler box that supposedly crimps over the box to hold in the shoes and seal.
Since mine kept coming off I spun it around and tacked it with my mig on each side, end of that story.